In a recent health insurance survey, employees at a large corporation were asked, “Have you been a patient in a hospital during the past year, and if so, for what reason?” The following results were obtained: 494 employees had an injury, 774 had an illness, 1,254 had tests, 238 had an injury and an illness and tests, 700 had an illness and tests, 501 had tests and no injury or illness, 956 had an injury or illness, and 1,543 had not been a patient.
a. What percent of the employees had been patients in a hospital?
b. What percent of the employees had tests in a hospital?
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